Chimney flue cap and wind diverter

ABSTRACT

This chimney uses the shape of its exterior housing and internal baffles to improve the draw of fireplace and stove chimneys while providing protection against precipitation and foreign objects entering the chimney. It has no moving parts, but the baffle design and exterior shape causes wind from any direction to enter at the bottom and exit from the top enhancing the chimney&#39;s draw by creating a vinturi affect. The side baffles shape diverts precipitation from the chimney while the center baffle has a precipitation collection and diversion system. This design avoids down drafts and allows the chimney to function as intended even in high winds.

This application claims the benefits under 35 U.S.C. 119(e) toprovisional application No. 60/253,262 filed Nov. 27, 2000. Chimney FlueCap and Wind Diverter is the name of this invention. BACKGROUND OF THEINVENTION

[0001] In many homes there may be multiple fireplaces with the chimneyflues close together above the roof line. While one fireplace has a firegoing the other has a tendency to draw the smoke down into the house,which is referred to as “Back Draft”. This flue cap was designed toprevent this effect. Of course, utilizing this particular flue cover ina single chimney home is ideal as well, given the specialized designattributes.

BRIEF SUMMARY OF INVENTION

[0002] This chimney cap uses the shape of its exterior housing andinternal baffles to improve the draw of fireplace and stove chimneyswhile providing protection against precipitation and wind entering thechimney. It has no moving parts, but the baffle design and exteriorshape causes wind from any direction to enter at the bottom and exitfrom the top enhancing the chimney's draw by creating a vinturi affect.

BRIEF DESCRIPTION OF THE DRAWINGS;

[0003] On page two of the drawings, figures two and three show part Cand the inner portion of part F that are used for the collection anddiversion of precipitation. Page three of the drawings show and labelall the parts and how they fit together. Page four shows the front, topand side view when put together. Pages five through sixteen show theindividual pieces and their dimensions.

DETAILED DESCRIPTION OF THE INVENTION

[0004] The side baffle shape diverts precipitation and wind from thechimney while the center baffle has a precipitation collection anddiversion system. This design avoids back drafts and allows the chimneyto function as intended, even in high winds. It has also been designedto prevent small animals foreign debree and birds from entering thechimney.

[0005] Most chimney flue covers are just hat covers! Their sides areopen for high winds to enter the chimney and create back draft problems.During these high winds, the rain and snow can also enter the chimney.My flue cap and wind diverter has solid aluminum sides that are anglesdo the wind, rain and snow will be deflected up an away from the flueitself. If the wind happens to enter from the bottom, the internalbaffles are designed to increase the draw and divert the wind outthrough the top.

[0006] Any metal/aluminum fabrication shop can cut and bend these partsto specification. The boxes for the end product can be obtained from anybox manufacturer, given the specifics and dimensions. If the flue coveris built to order, then it can be boxed up along with installationdirections and sold using many marketing avenues to various consumers.The product can also be boxed unassembled and sold for consumer assemblyat home.

[0007] My chimney cap is made of our 26 gage aluminum sheeting withspecific dimensions and is held together by {fraction (3/16)}″ rivets.Once all the parts have been cut and bent to the correct angles, theycan be connected with these rivets. All outer ½″ edges should be foldedat a 90-degree angle unless specified. The following is a list of howthe parts should be put together, in order.

[0008] 1. A & B should be connected at the outer edges.

[0009] 2. Connect parts J & I together.

[0010] 3. Connect parts H then G on to the top of I.

[0011] 4. Place part C along the center of G and connect.

[0012] 5. Place parts A & B on top of C and along the center of G andconnect.

[0013] 6. Connect the interior of parts F to the outside edges of J.

[0014] 7. Align parts D with parts F and H and connect.

[0015] 8. Connect parts M & N to parts K & L; (See page 15 of thedrawings).

[0016] 9. Connect parts K to A.

[0017] 10. Connect parts L to F.

[0018] 11. Connect parts E to parts K, D & L

[0019] 12. Place on top of the chimney and let rest on the upper innerportions of J& I.

[0020] 13. Fold back the lower portions of J & I if need be.

[0021] 14. Place the tightening ban around the lower portion of J & Iand secure.

[0022] The sides of the flue cap are angled so that during winds, theairflow coming up through the flue will increase, instead of allowingsmoke to travel back down the chimney. The center of the flue cap is setdown approximately 1 ¼″ to prevent backdraft airflow down the flue.

[0023] See FIGS. 2 & 3. These lips are designed to prevent rain fromgoing down the flue. FIG. 2 shows a portion of part F running the lengthof the flue itself, 13 inches. If water happens to get inside the cover,this lip, part F, will divert the water to the outside of the flue. FIG.3 shows part C attached to the lower portion of unit B. When water dripsdown the side of unit B, it is caught by part C and is diverted to drainthrough the hole in part H. Jan. 12, 2000

[0024] The flue cover is designed to include protective screening on allthe openings to prevent animals and birds from entering the chimney andcausing blockage problems. See the drawings for parts K & L.

[0025] As you can tell by the drawings, using this flue cover can modifya 12×12 flue opening at 144 Sq. inches to approximately 200 Sq. inches.The Flue cover can also be modified to fit a rectangular or cylindricalflue by modifying parts H, I & J.

[0026] The flue must extend at least three inches above the chimney forattachment purposes. The upper, inner lip of parts I & J need to rest ontop of the flue itself. A tightening band will be placed below the uppertwo inches of I & J and secured. If need be, the lower portions of partsI & J can be folded back below this band.

1. What I claim as my invention is: The following claims are why thisChimney Flue Cap and Wind Diverter are better than any other on themarket.
 2. What I claim as my invention is: The internal baffle andexterior shape of the chimney flue cap will divert rain, snow and windfrom entering the chimney.
 3. What I claim as my invention is: Theinternal baffle and exterior shape of the chimney flue cap will enhancethe draw of the chimney while eliminating the down draft.
 4. What Iclaim as my invention is: The flue cap is designed to include protectivescreening on all openings to prevent animals from entering the chimney.5. What I claim as my invention is: The flue cap can be made to fit arectangular or cylindrical flue by modifying parts H, J and I.